Year	Percent
2000	74.93134
2001	76.17576
2002	77.42769
2003	78.68714
2004	79.95411
2005	81.2286
2006	82.51061
2007	83.80014
2008	85.09719
2009	86.40176
2010	87.71384
2011	89.03345
2012	90.36058
2013	91.69522
2014	93.03738
2015	93.03738
2016	93.03738
2017	93.03738
2018	93.03738